Seiko Cal. 6681 - 738

Seiko 6681-738

The 6681-738 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6681 caliber with 31j jewels beating at 36,000 bph, it delivers a 68 hours power reserve. [seikata-wm-943a6ded3da5]

Also known as: Helmet

Specifications

Movement
Hand-Winding
Case Material
Stainless Steel
Case Width
41mm
Case Thickness
13.4mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
50m
Dial Color
Navy
Jewels
31j
Frequency
36,000 bph
Power Reserve
68 hours
Year
1969

Related Models

seikata-wm-943a6ded3da5